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Page 73
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Maintenance
B800-00-880 Issue D
5.5.6
Bearing run time
The run hours and recommended service time of the bearing in the nEXT pump can be monitored by sending the
following query:
The reply will be as follows, where the first number is the hours run by the bearing and the second is the number of
hours until service is recommended:
5.5.7
Oil cartridge run time
The run hours and recommended service time of the oil cartridge in the nEXT pump can be monitored by sending the
following query:
The reply will be as follows, where the first number is the hours run by the oil cartridge and the second is the number
of hours until service is recommended:
5.5.8
Flashing error codes
Whenever a fail condition becomes active, the red alarm lights continuously or shows a flashing sequence. If the error
light is on continuously, this indicates a problem with the embedded software. In this case, try cycling the power. If
cycling the power does not clear the indication, a software download will be required. Contact the supplier or
Edwards. If the alarm LED is flashing, identify the error flash code and consult
Table 28
.
There is a sufficient off period between each subsequent cycle repetition to clearly mark the start of a new flash
sequence. The duration of a long flash (L) is equal to 3 times the duration of a short flash (0.5 s).
Command
?
V
8
8
5
cr
Reply
=
V
8
8
5 sp
d
d
d
d
d
d
;
d
d
d
d
d
d
cr
Command
?
V
8
8
6
cr
Reply
=
V
8
8
6 sp
d
d
d
d
d
d
;
d
d
d
d
d
d
cr
Table 28 - Flashing error codes
Error flash
position
Error flash
code
Comments
Actions
0
ssssss
The speed fell below 50% of full
rotational speed with the Timer
disabled.
Check whether the pump is too hot or
whether the inlet pressure is too high.
1
Lsssss
Controller internal software mismatch. Cycle the power to the pump and see
whether the error code appears again.
If it does, contact the supplier or
Edwards.
2
sLssss
Controller failed internal configuration
and calibration operation.
Cycle the power to the pump and see
whether the error code appears again.
If it does, contact the supplier or
Edwards.
3
ssLsss
Failure to reach or maintain half full
speed within the timer setting value.
Check whether the pump is too hot or
whether the inlet pressure is too high.
4
sssLss
Overspeed or overcurrent trip
activated, or other hardware fault.
Cycle the power to the pump and see
whether the error code appears again.
If it does, contact the supplier or
Edwards.
